摘要
为研究转向系参数对干摩擦诱发的汽车自激摆振多极限环特性影响,以在一定车速下具有多频多幅摆振独立悬架汽车为样车,将悬架与转向系统运动副间隙处干摩擦等效到前轮主销处,应用拉格朗日方程建立了干摩擦主导型的汽车摆振系统3自由度模型。基于上述模型,在数值计算时轮胎选用魔术公式,而干摩擦模型选用Stefanski-Wojewoda动态模型。结果表明,该样车在一定车速下因初始激励的不同而会出现不同幅值的自激摆振;横拉杆刚度和主销处的干摩擦力矩均对自激摆振系统的分岔区间有较大影响。分析结果可为抑制该类型汽车自激摆振提供理论参考。
In order to get the effects of the steering parameters on vehicle shimmy, regarding the dry friction of the suspension and steering as that of kingpin, a 3-dof vehicle shimmy system which is leaded by dry friction was built based on Lagrange equation. Magic equation and Stefanski-Wojewoda dynamic model were chosen as the tire force model and dry friction model. The above model was calculated. The results show that the stiffness of tie rod and dry friction torque influence the diversion region of the system a lot. To suppress this kind of self-excited shimmy, this paper can be referred.
出处
《农业装备与车辆工程》
2014年第10期1-6,共6页
Agricultural Equipment & Vehicle Engineering
基金
国家自然科学基金资助项目(51375130
51050002)
关键词
自激摆振
多极限环
横拉杆刚度
主销后倾角
干摩擦
self-excited shimmy
muhi-limit cycles
tie rod stiffness
kingpin caster angle
dry friction
作者简介
张志龙（1990-）,男,硕士研究生,研究方向：车辆系统动力学.Email：womahou@163.com
